Table 4 Crashworthiness parameters all metal/polymer tested pipes.

Specimen code	Sample No	\({\mathrm{F}}_{\mathrm{ip}}\), kN	\({\mathrm{F}}_{\mathrm{m}}\), kN	U, J	SEA, J/g	CFE
Al	1	64.84	37.84	2986.84	39.23	0.58
	2	58.87	31.65	2751.70	34.67	0.54
	3	61.90	35.99	2636.98	32.90	0.58
	Avg	61.87	35.16	2791.84	35.60	0.57
	SD	2.44	2.60	145.61	2.71	0.02
	CV, %	3.94	7.39	5.22	7.61	3.51
Al/8J	1	76.72	44.58	3145.98	29.43	0.58
	2	85.41	51.43	2945.75	28.04	0.60
	3	80.37	50.81	3381.58	32.77	0.63
	Avg	80.88	48.94	3157.77	30.08	0.60
	SD	3.56	3.10	178.12	1.98	0.02
	CV, %	4.40	6.33	5.64	6.58	3.33
Al/4J/4G	1	83.21	59.82	3700.02	42.74	0.72
	2	87.18	55.43	3597.33	38.93	0.64
	3	89.26	53.35	3327.33	35.66	0.60
	Avg	86.55	56.20	3541.56	39.11	0.65
	SD	2.51	2.70	157.21	2.90	0.04
	CV, %	2.90	4.27	4.44	7.41	6.15
Al/4G/4J	1	82.41	54.02	3337.96	38.33	0.66
	2	87.88	60.64	3498.73	41.66	0.63
	3	92.39	55.17	3864.04	42.74	0.66
	Avg	87.56	56.61	3566.91	40.91	0.65
	SD	4.10	2.90	220.11	1.88	0.01
	CV, %	4.68	5.12	6.17	4.60	1.54
Al/2J/4G/2J	1	82.51	57.37	3714.26	39.76	0.70
	2	80.55	63.55	4151.36	45.64	0.79
	3	74.93	58.36	3791.03	43.36	0.78
	Avg	79.33	59.76	3885.55	42.92	0.75
	SD	3.20	2.70	190.56	2.42	0.04
	CV, %	4.03	4.52	4.90	5.64	5.33
Al/2G/4J/2G	1	85.66	50.07	3335.55	35.21	0.58
	2	79.65	52.43	3654.40	39.01	0.66
	3	78.56	47.14	3185.69	32.01	0.60
	Avg	81.29	49.88	3391.88	35.41	0.61
	SD	3.12	2.20	195.45	2.90	0.03
	CV, %	3.84	4.41	5.76	8.19	4.92
Al/8G	1	75.76	47.60	3327.03	38.11	0.63
	2	82.68	43.53	3161.53	33.91	0.53
	3	74.28	41.74	2813.27	33.01	0.56
	Avg	77.54	44.29	3100.61	35.01	0.57
	SD	3.70	2.45	214.11	2.20	0.04
	CV, %	4.77	5.53	6.91	6.28	7.02

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